          [:div.build-config-string [:pre config-string]]
          (circle-yml-ad))))))
 
+(defn build-parameters [{:keys [build-parameters]} owner opts]
+  (reify
+    om/IRender
+    (render [_]
+      (html
+       [:div.build-parameters
+        [:pre (for [[k v] build-parameters
+                    :let [pname (name k) pval (pr-str v)]]
+                (str pname "=" pval \newline))]]))))
+
 (defn expected-duration
   [{:keys [start stop build]} owner opts]
   (reify

            [:li {:class (when (= :config selected-tab) "active")}
             [:a {:on-click #(raise! owner [:build-header-tab-clicked {:tab :config}])}
              "circle.yml"]]

            (when logged-in?
              [:li {:class (when (= :usage-queue selected-tab) "active")}

                                  {:opts {:show-node-indices? (< 1 (:parallel build))}})

             :config (om/build build-config {:config-string (get-in build [:circle_yml :string])})

             :build-parameters (om/build build-parameters {:build-parameters build-params})

             :usage-queue (om/build build-queue {:build build
                                                 :builds (:builds usage-queue-data)
